How Much does It Cost to Mail a Postcard?

As of May 11, 2009 the cost for mailing a standard postcard (6 inches X 4.25 inches) is $.28 cents. However if you need to mail one of those larger post cards the cost would be $.44 cents. There’s are great website from the U.S. Postal Service that has a calculator for both domestic and international postage prices and it is at